transponder
The fact of transponder being off - it bothers me - such a simple thing,
-result of the unknown systems failure-all out?
-off accidentally by a disabled(smoke or O2 loss), stumbling, crew without ill intent?
-ill intent? What is the significance of transponder being off, if that is the case?
- coincidental malfunction like on AI127 at the time when a major event leading to the plane loss was occurring or just about to occur?
What do the 777-200 pilots think is most probable- how soon would you know that the transponder malfunctions, what are the remedial steps?
Apologies to mods, but it is not just about speculations- the transponder was off, it is the first known fact and undisputed fact